package com.demo;

import java.util.ArrayList;
import java.util.List;

public class UserDao {

    /**
     * 保存用户
     * @return
     */
    public void saveUsrer (String userName){
        System.out.println("保存用户");

    }

    public List<String> queryAllUser () {
        ArrayList<String> users = new ArrayList<String>();
        System.out.println("查询所有的用户");
        return users;
    }

}
